Figure 5.

Relationship between the voltage pulse-induced calcium currents and the C_m change. A, Ba²⁺ currents (determined in the presence of extracellular Ba²⁺) at different membrane potentials. B, Changes in membrane capacitance (C_m) recorded before and after the pulse were measured at the same membrane potentials in Ca²⁺-containing Tyrode's. Cells were held at −70 mV before stimulating them with the voltage protocol. Each value of C_m represents the average value obtained from 10 runs (n = 4 cells). C, Changes in C_m recorded after a single voltage pulse series in a different set of taste cells (n = 10 cells). Ba²⁺ currents are combined in A from both sets of cells. Error bars represent SEM. The asterisks adjacent to data points show the level of significance (***p < 0.001, **p < 0.01, *p < 0.05, in comparison with the response to −60 mV; one-way ANOVA with Tukey's multiple-comparison test).